What is a planetary retrograde? And what connection does it have to astrology? We explain how planets move across the sky.

Mercury, the smallest planet in the solar system, holds an outsized secret that some researchers believe could reshape how humans think about expanding into space. With an iron core that dominates its ...

Mercury has long been cast as the solar system’s burnt-out rock, a relic too small and too close to the Sun to hold many ...

Starting July 17, Mercury will be retrograde until August 10. During these three and a half weeks, many people expect life to go haywire—phones will break, contracts will fall through, you'll ...

Mercury is the smallest planet in our solar system. Explore its size, extreme temperatures, core structure, and comparison with Pluto.

Meteorites found in the Sahara Desert might be pieces of Mercury that broke off as the result of a collision when the Solar System was still forming. The meteorites had many parallels to the surface ...

KINGSPORT, Tenn. (WJHL) —This week, the night sky will provide the opportunity to view up to seven planets in our solar system. Mercury, Venus, Mars, Jupiter and Saturn will be visible to the naked ...

The early years of our solar system were a period of unimaginable chaos and violence, a gravitational free-for-all where colliding planetary embryos competed for survival. In this tumultuous ...